org.spout.api.protocol.dynamicid.DynamicMessageDecoder.java Source code

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Here is the source code for org.spout.api.protocol.dynamicid.DynamicMessageDecoder.java

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/*
 * This file is part of Spout.
 *
 * Copyright (c) 2011 Spout LLC <http://www.spout.org/>
 * Spout is licensed under the Spout License Version 1.
 *
 * Spout is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * In addition, 180 days after any changes are published, you can use the
 * software, incorporating those changes, under the terms of the MIT license,
 * as described in the Spout License Version 1.
 *
 * Spout is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
 * more details.
 *
 * You should have received a copy of the GNU Lesser General Public License,
 * the MIT license and the Spout License Version 1 along with this program.
 * If not, see <http://www.gnu.org/licenses/> for the GNU Lesser General Public
 * License and see <http://spout.in/licensev1> for the full license, including
 * the MIT license.
 */
package org.spout.api.protocol.dynamicid;

import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import java.util.List;

import org.spout.api.protocol.CommonHandler;
import org.spout.api.protocol.Message;
import org.spout.api.protocol.Protocol;
import org.spout.api.protocol.Session;

/**
 * Unwraps dynamically allocated id messages
 */
public class DynamicMessageDecoder extends MessageToMessageDecoder<Message> {

    @Override
    protected void decode(ChannelHandlerContext ctx, Message message, List<Object> out) throws Exception {
        Message unwrapped = message;
        Session session = ctx.pipeline().get(CommonHandler.class).getSession();
        if (session != null) {
            Protocol protocol = session.getProtocol();
            while (unwrapped instanceof DynamicWrapperMessage) {
                unwrapped = ((DynamicWrapperMessage) unwrapped).unwrap(protocol);
            }
        }
        if (unwrapped != null) {
            out.add(unwrapped);
        }
    }
}